Meditations - pg. 121

I must begin by observing the great difference between mind and body. Body is of its nature always divisible; mind is wholly indivisible. When I consider the mind -- that is, myself, in so far as I am merely a conscious being -- I can distinguish no parts within myself; I understand myself to be a single and complete thing. Although the whole mind seems to be united to the whole body, yet when a foot or an arm or any other part of the body is cut off I am not aware that any subtraction has been made from the mind. Nor can the faculties of will, feeling, understanding and so on be called its parts; for it is one and the same mind that wills, feels, and understands. On the other hand, I cannot think of any corporeal or extended object without being readily able to divide it in thought and therefore conceiving of it as divisible. This would be enough to show me the total difference between mind and body, even if I did not sufficiently know this already.